CVE-2015-5296

Description

Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 supports connections that are encrypted but unsigned, which allows man-in-the-middle attackers to conduct encrypted-to-unencrypted downgrade attacks by modifying the client-server data stream, related to clidfs.c, libsmb_server.c, and smbXcli_base.c.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 4.14% Top 15%
Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory samba.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=a819d2b440aafa3138d95ff6e8b824da885a70e9
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html vendor advisory mailing list third party advisory
https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=1ba49b8f389eda3414b14410c7fbcb4041ca06b1
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html vendor advisory mailing list third party advisory
http://www.ubuntu.com/usn/USN-2855-2 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html vendor advisory mailing list third party advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html third party advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html vendor advisory mailing list third party advisory
http://www.securityfocus.com/bid/79732 third party advisory vdb entry
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html vendor advisory mailing list third party advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html vendor advisory mailing list third party advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993 third party advisory
https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=d724f835acb9f4886c0001af32cd325dbbf1f895
http://www.securitytracker.com/id/1034493 third party advisory vdb entry
http://www.debian.org/security/2016/dsa-3433 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html vendor advisory mailing list third party advisory
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html third party advisory
https://security.gentoo.org/glsa/201612-47 third party advisory vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1290292 third party advisory issue tracking
https://www.samba.org/samba/security/CVE-2015-5296.html vendor advisory
http://www.ubuntu.com/usn/USN-2855-1 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html vendor advisory mailing list third party advisory

Frequently Asked Questions

What is the severity of CVE-2015-5296?
CVE-2015-5296 has been scored as a medium severity vulnerability.
How to fix CVE-2015-5296?
To fix CVE-2015-5296, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-5296 being actively exploited in the wild?
It is possible that CVE-2015-5296 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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